Prethodno priopćenje

Degradation of mechanical properties of CrMo creep resistant steel operating under conditions of creep

J. Michel ; Faculty of Metallurgy, Technical University of Košice, Slovakia
M. Buršák ; Faculty of Metallurgy, Technical University of Košice, Slovakia
Ilija Mamuzić ; Croatian Metallurgical Society, Zagreb, Croatia

Sažetak

Mechanical properties of a steam tube made of CrMo creep resistant steel are analyzed in this contribution after up to 2,6•105 hours service life in creep conditions at temperature 530 °C and calculated stress level in the tube wall 46,5 MPa. During service life there were in the steel gradual micro structure changes, first pearlite spheroidization, precipitation, coaugulation and precipitate coarsening. Nevertheless the strength and deformation properties of the steel (R_e, R_m, A₅, Z), and the resistance to brittle fracture and the creep strength limit, were near to unchanged after 2,1•105 hours in service. The steam tube is now in service more than 2,6•105 h.

Ključne riječi

mechanical properties; creep resistant steel; creep properties; degradation

Hrčak ID:

71179

URI

https://hrcak.srce.hr/71179

Datum izdavanja:

2.1.2012.

Podaci na drugim jezicima: hrvatski

Posjeta: 2.424 *